Modifiers don't work on particle instances of a hidden object #96536

New Issue

Germano Cavalcante · 2022-03-16T21:26:28+01:00

2022-03-16 21:26:28 +01:00

System Information
Operating system: Linux Mint 20.3 Cinnamon kernel 5.13.0-35
Graphics card: 3400G

Blender Version
Broken: 2.83
Working: apparently never

Short description of error
Related to #96367 (Crash when trying to snap to instances on an object)
To replicate bug, the instantiated Object (the one with a Modifier) has to meet the following conditions:

Must have a modifier (obviously)
Must be instantiated through a particle system. (instantiated through Geom Nodes is OK and through Dupli Verts/Faces hides the Object as well)
Must be hidden inside a collection with the Excluded from View Layer option enabled

And the instantiating Object (the one with Particle System) has to meet the following conditions:

Must be referenced by a Camera in the "Focus on Object" field
In the outliner, the Camera object must be placed in a Collection before the instantiating Object


Camera placed before	Camera placed after

Exact steps for others to reproduce the error

Open the attached file

Unhide collection or switch Camera and Plane with particle system collections order (via Drag and Drop) get around the problem.
Camera 'Focus on Object' - particle system issue.blend

**System Information** Operating system: Linux Mint 20.3 Cinnamon kernel 5.13.0-35 Graphics card: 3400G **Blender Version** Broken: 2.83 Working: apparently never **Short description of error** Related to #96367 (Crash when trying to snap to instances on an object) To replicate bug, the instantiated Object (the one with a `Modifier`) has to meet the following conditions: * Must have a modifier (obviously) * Must be instantiated through a particle system. (instantiated through Geom Nodes is OK and through Dupli Verts/Faces hides the `Object` as well) * Must be hidden inside a collection with the `Excluded from View Layer` option enabled And the instantiating Object (the one with `Particle System`) has to meet the following conditions: * Must be referenced by a `Camera` in the "`Focus on Object`" field * In the outliner, the `Camera` object must be placed in a `Collection` before the instantiating Object |![Camera collection top.png](https://archive.blender.org/developer/F12922797/Camera_collection_top.png)|![Linked object collection top.png](https://archive.blender.org/developer/F12922798/Linked_object_collection_top.png)| | -- | -- | |Camera placed before |Camera placed after **Exact steps for others to reproduce the error** # Open the attached file Unhide collection or switch `Camera` and `Plane with particle system` collections order (via Drag and Drop) get around the problem. [Camera 'Focus on Object' - particle system issue.blend](https://archive.blender.org/developer/F12932091/Camera__Focus_on_Object__-_particle_system_issue.blend)

Germano Cavalcante commented

2022-03-16 21:26:28 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-03-16 21:27:33 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Germano Cavalcante commented

2022-03-16 21:27:33 +01:00

Added subscriber: @david_black

David Black commented

2022-03-17 18:24:34 +01:00

More interesting than first realised...

Found also happens for local (non-linked) objects.
Doesn't matter if 'GPU Subdivision' is enabled / disabled if the mesh used for a particle system has 'Auto Smooth' enabled.

Since unable to edit the first post,please find below a possible revised version..

_

Operating system: Linux Mint 20.3 Cinnamon kernel 5.13.0-35
Graphics card: 3400G

Blender Version
Broken: 2.83
Working: apparently never

Short description of error
Possibly related to #96367 (Crash when trying to snap to instances on an object)
Object non-functional modifier (Camera + Collections order). Following conditions must apply...

Object with a particle system
Mesh used for the particle system has a modifier, and 'Auto Smooth' enabled
Camera in a Collection (placed before the linked object)
Camera 'Focus on Object' = object with a particle system

Should also mention; removing the Camera 'Focus on Object' = object with a particle system also fixes the non-functional modifier.

Exact steps for others to reproduce the error

Open file 'Camera 'Focus on Object' - particle system issue.blend'.
Switching 'Camera' and object with particle collections order (via Drag and Drop) = non-functional modifier, see screenshots.
Camera 'Focus on Object' - particle system issue.blend

Edit:
Video removed since only shows as a download, HTML tags required?

More interesting than first realised... Found also happens for local (non-linked) objects. Doesn't matter if 'GPU Subdivision' is enabled / disabled if the mesh used for a particle system has 'Auto Smooth' enabled. Since unable to edit the first post,please find below a possible revised version.. _ Operating system: Linux Mint 20.3 Cinnamon kernel 5.13.0-35 Graphics card: 3400G **Blender Version** Broken: 2.83 Working: apparently never **Short description of error** Possibly related to #96367 (Crash when trying to snap to instances on an object) Object non-functional modifier (Camera + Collections order). Following conditions must apply... * Object with a particle system * Mesh used for the particle system has a modifier, and 'Auto Smooth' enabled * Camera in a Collection (placed before the linked object) * Camera 'Focus on Object' = object with a particle system |![Camera collection top.png](https://archive.blender.org/developer/F12922797/Camera_collection_top.png)|![Linked object collection top.png](https://archive.blender.org/developer/F12922798/Linked_object_collection_top.png)| | -- | -- | Should also mention; removing the Camera 'Focus on Object' = object with a particle system also fixes the non-functional modifier. **Exact steps for others to reproduce the error** - Open file 'Camera 'Focus on Object' - particle system issue.blend'. - Switching 'Camera' and object with particle collections order (via Drag and Drop) = non-functional modifier, see screenshots. [Camera 'Focus on Object' - particle system issue.blend](https://archive.blender.org/developer/F12932091/Camera__Focus_on_Object__-_particle_system_issue.blend) Edit: Video removed since only shows as a download, HTML tags required?

Germano Cavalcante changed title from ~~Modifiers don't work on particle instances of a linked object~~ to Modifiers don't work on particle instances of a hidden object

2022-03-17 19:38:14 +01:00

Campbell Barton commented

2022-05-12 09:37:32 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2022-05-12 09:37:32 +02:00

Setting as a dependency graph bug since the creation of an evaluated mesh depends on the collection order.

Philipp Oeser removed the

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Modifiers don't work on particle instances of a hidden object #96536

Open the attached file